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I agreeImaging telescope or lens:TS-Optics 8" Ritchey-Chrétien Pro
Imaging camera:ZWO ASI 294MC Pro
Mount:Sky-Watcher EQ6-R
Guiding telescope or lens:TS-Optics 8" Ritchey-Chrétien Pro
Guiding camera:ZWO ASI120MM-S
Software:Luc Coiffier DeepSkyStacker, Robin Glover SharpCap, Pleiades Astrophoto PixInsight
Accessories:ZWO Off-Axis Guider, Lacerta LED Flatfield-Box
Resolution: 6560x4231
Dates:March 29, 2019
Frames: 137x120" (gain: 120.00) -20C bin 1x1
Integration: 4.6 hours
Darks: ~173
Flats: ~50
Flat darks: ~50
Avg. Moon age: 23.33 days
Avg. Moon phase: 37.51%
Bortle Dark-Sky Scale: 4.00
Temperature: 7.00
Astrometry.net job: 2621861
RA center: 168.701 degrees
DEC center: 55.018 degrees
Pixel scale: 0.299 arcsec/pixel
Orientation: 272.674 degrees
Field radius: 0.324 degrees
Locations: Backyard, Vechelde, Niedersachsen, Germany
Data source: Backyard
A lot went wrong this evening. Autoguiding was terrible until i performed the meridian flip. After the flip guiding was very smooth. The next day i tried to track down the problem but was not very successful. It seems that the scope was not well balanced - or there is some sort of mechanical problem in the northeast?
Whatever, another problem occured: Something is terrible wrong with my flats. They inject a lot of noise into the image (remember the 'annoying-noise-blob' i tried to track down in february?). The reason for this noise is unknown to me, but it is clear that the flats are the source. Maybe i will upload an image of a noised flat later.
[Edit]: I uploaded an image called "The 'annoying-noise-blob', so if you want to see it in it's full splendor just take a look :-)
Nevertheless the image is much better than my first owl nebula a year ago - no wonder, the ASI294 Pro is superior to the uncooled ASI178MC i used back than. And i had to stop imaging after an hour or so due to an incoming flu i got last year. So all in all i improved my M 97 in my personal collection. Maybe i'll be back next year, hoping that i know how to take flats properly :-)
[Edit] I reprocessed the image with my new darks (taken in a refrigerator), without bias and with flats from february. Seems to be better, i think.
Reprocessed with new darks, without bias and working flat.
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